Skype allows people to communicate with each other by messaging, voice calling and video calling over internet. Skype also provides services for phone calls on the telephone networks. Everybody can call on Skype network free of charge there is no limit of call, on the other side Skype charge users for calling to land-line and mobile phones. Skype becomes popular among users for its additional features, like file sharing, screen sharing, video conferencing. Now we are going to install it on Ubuntu.
First you have to enable the Canonical repository.
Open Terminal(Alt + Ctrl + T) and paste the following command to enable the repository.
You can also use this commands in Linux Mint to enable the repository and you are able to install Skype in it.
Update the repository.
Finally after all the updates, paste the following command to install Skype.
You have successfully installed Skype 4.2 in your system.
Select Dash -> type "skype" on the space of search -> Click the icon of Skype to start the Skype.

Open Terminal(Alt + Ctrl + T) and paste the following command to enable the repository.
You can also use this commands in Linux Mint to enable the repository and you are able to install Skype in it.
sudo add-apt-repository "deb http://archive.canonical.com/ $(lsb_release -sc) partner"
Update the repository.
sudo apt-get update
Finally after all the updates, paste the following command to install Skype.
sudo apt-get install skype && sudo apt-get -f install
You have successfully installed Skype 4.2 in your system.
Select Dash -> type "skype" on the space of search -> Click the icon of Skype to start the Skype.